JP2003263153A - Japanese drum - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a Japanese drum which enables players to adjust a skinning state by themselves even on a site, such as at a school, without the need for commissioning the adjustment of the tensing degrees of skin to specialized traders. <P>SOLUTION: The Japanese drum is provided with a head forming body 12 formed by riveting the skin 18 in a stretched state to a frame 6 and a shell 14 projectingly provided with a mount 20 having a fitting wall 20a externally fittable with the body 12. The body 12 is detachably coupled by means of coupling means, such as tapping screws 22, to the mount 20. The frame 16 is formed as divided bodies 30 and 32 having spaces S and the skin 18 is riveted to the base side divided body 32 and further jacks 40 capable of adjusting the distances between the spaces of the divided bodies 30 and 32 by being operated from the opening side of the base side divided body 32 are disposed between the divided bodies 30 and 32. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention comprises a drum surface forming body in which a skin is stretched and fixed to a frame body by tacking, and a body in which the drum surface forming body is detachable via a connecting member. Regarding Japanese drums.

[0002]

2. Description of the Related Art In a conventional Japanese drum, at least one end of a wooden body has a leather (leather) constituting the drum surface stretched and fixed directly by tacking. In such a Japanese drum, when the leather is loosened or the leather is damaged or deteriorated, it is necessary to perform maintenance such as re-tensioning work or replacement work of the leather.

[0003] Here, at the time of this re-tensioning work or replacement work, the peripheral side of this leather is pulled at the end of the body while pulling the leather in a circular shape or the like evenly outward of its radius. It is necessary to fix it with tacks at the end of the body. Moreover, it is also necessary to accurately adjust the tension of the leather when fixing the tacks, that is, to tune the taiko drum accurately. Therefore, these operations require skill,
It is generally difficult for the user of Wadaiko to do it.
For example, in an educational institution such as a school, it is practically impossible for teachers, students, etc. to perform these tasks when using Japanese drums as learning materials. Therefore, the user
It is common to outsource these tasks to a Japanese drum maintenance company or manufacturer (hereinafter referred to as a “specialist”).

Since some large-sized Japanese drums have a body diameter exceeding 1 m, it is troublesome to transport the Japanese drums to a maintenance company or the like, and the re-tensioning work is also troublesome.

Further, in the conventional Japanese drum, as described above,
Since it is necessary to fix the leather directly to the body with studs,
The material of the body was limited to wood, which hindered the production of a wide variety of Japanese drums.

In order to solve these problems, the present inventor previously proposed a Japanese drum having the following structure (Japanese Patent Application No. 2000).
-347227: Not yet published at the time of application).

"A trunk body having a substantially cylindrical mounting portion provided in a protruding manner,
A frame body that is made of wood and that is fixed by tacking the leather that constitutes the drum surface in a stretched state, and the frame body can be attached to and detached from the attachment portion using a connecting member. Japanese drums that are characterized by being exteriorized. With the wadaiko of the above construction, when the skin is re-tensioned and replaced, it is easy to carry it in and out, and it is possible to increase the degree of freedom of the body forming material.

However, it was still necessary to outsource the adjustment of the skin tension to a specialist.

[0009]

DISCLOSURE OF THE INVENTION In view of the above, the present invention makes it possible for a performer or the like to adjust the skin tension state on their own even in the field of school etc. without the need to entrust the adjustment of the skin tension to a specialist. It is to provide drums.

The Japanese drum according to the present invention has the above-mentioned object (problem).
Is solved by the following configuration.

[0011] A drum surface forming body having a drum surface formed by tensioning and fixing the skin in a stretched state on a frame body made of a material that can be tacked, and a fitting that allows the drum surface forming body to be fitted externally. A drum drum having a drum body having a mounting portion having a wall portion protruding from at least one end side, and a drum surface forming body detachably coupled to the mounting portion via a connecting means, wherein the frame body has a drum shaft. It is a divided body with a gap in the plane orthogonal to the direction, the skin is fixed to the original side divided body by studs, and further, the gap distance of the divided body is operated by operating from the base opening side of the original side divided body. It is characterized in that it is provided with an adjustable interval adjusting means.

With the above structure, when the skin becomes loose, the drum surface forming body can be detached from the body by operating the connecting means, and the space adjusting means can be manually operated from the opening side of the base portion of the base side divided body. The skin tension can be adjusted. Therefore, it is not necessary to entrust the adjustment of the skin tension to a professional company, and the teacher or the performer can adjust the tension of the drum surface by himself / herself even at a site such as a school or a practice field.

In the above structure, the gap adjusting means may be a screw jack so that the gap can be easily adjusted.
It is desirable to attach the loosening prevention spring body to the screw jack. This is to prevent the screw jack from loosening due to vibration when playing the drum.

The connecting means is provided with a plurality of sets of tapping screws and a decorative cap, the tapping screws can be screwed into the mounting portion by penetrating the original side divided body, and the decorative cap is the original side. It is desirable to be held by the divided body so as to hide the head of the tapping screw. After the drum surface forming body is removed from the body, when the drum surface forming body is attached to the body again, it is not necessary to realign the peripheral surfaces because the tapping screw is used. Further, the connecting means is not exposed to the outside, and the design of the conventional Japanese drum can be maintained.

In the above construction, the former side divided body is provided with the introduction hole portion (stepped hole) of the tapping screw, and the decorative cap is provided with a holding cylinder portion capable of fitting and holding the introduction hole portion of the tapping screw. It is desirable to have a configuration. At the time of removal, the head of the tapping screw does not protrude from the peripheral surface of the drum surface forming body (it does not interfere with other members and there is no risk of damage), and the cap can be attached and removed simply by inserting the tube into the introduction hole. It will be easy.

Further, in each of the above constructions, it is desirable that the body is made of reinforced plastic. It is easy to secure the screwing strength and screwing strength of the tapping screw of the mounting part, and it is easy to mold the body with rich design.
Furthermore, the sound quality at the time of performance is not inferior to that of the conventional one which is entirely made of wood.

[0017]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings.

As shown in FIGS. 1 and 2, the Japanese drum A according to the first embodiment has a drum surface forming body 12 and a barrel-shaped body 14 as basic constituent elements.

The drum surface forming body 12 forms a drum surface B by tacking and fixing the skin 18 in a stretched state on a frame body 16 made of a material that can be tacked.

Here, the material of the frame 16 is usually natural wood, but is not particularly limited as long as it is a material that can be tacked.
Wood materials such as laminated wood, laminated wood, hard / semi-hard fiber board, particle board, etc.
The same material as the body such as reinforced plastic may be used.

The body 14 is provided with a mounting wall 20a on which the drum surface forming body 12 can be fitted, and a locking step 20b for locking the original side of the drum surface forming body 12.
Are formed on both ends in the drum axis direction.

Here, in the present embodiment, the mounting portion 20 is formed on both end sides and the pair of drum surface forming bodies 12 are mounted, but the mounting portion 20 is formed only on one end side and the other end side. May be closed. In this case, a closed portion may be formed at the same time when the body is molded to form a bottomed body, or a closing plate may be attached after the body is molded.

The mounting wall 20a has a cylindrical shape in the illustrated example, but may have a divided shape having a gap in the circumferential direction. The number of divisions can be any number as long as there is no problem in strength,
As in the present embodiment, for example, when the drum surface forming body 12 is connected (fixed) with five tapping screws (screws) 22,
When the tapping screw 22 is screwed in, the number of divided members is 5 or less, so that there is no possibility that the tip of the screw will be in the gap when the screw is screwed in.

Here, the material of the body 14 may be the above-mentioned wood material, but is not particularly limited as long as it can secure the strength, and includes reinforced plastic (FRP), metal, ceramics (pottery, earthenware, porcelain). .), Plastic (including an impregnated paper laminate), and the like. However, when the drum surface forming body 12 is attached to the attachment portion 20 of the body 14 by the tapping screw 22 as in this embodiment, at least the attachment portion is made of a material such as reinforced plastic or aluminum into which the tapping screw 22 can be screwed. To do.

When the body 14 is an FRP, for example,
An FRP material containing glass fibers is applied to the inner surface of the mold by a trowel coating or a spray coating to produce a stacking effect.

Further, when the body 14 is made of metal, it is manufactured by die casting from a metal material such as aluminum or by using sheet metal working or welding from an aluminum plate.

At four points on the outer peripheral surface of the body 14, mochi metal fittings 26 functioning as "handles" when carrying the main Japanese drum A are attached.

Although not necessarily required depending on the material of the body, the fitting wall portion (mounting wall portion) of the mounting portion 20 is usually used.
The damping material 28 is fitted on the 20a.

The vibration damping material 28 is usually made of a polymer elastic material such as rubber, thermoplastic elastomer or elastic foam.

In the above structure, the frame body 16 is a divided body having a gap S on the plane orthogonal to the drum axis direction, in the illustrated example, a divided body of the front side divided body 30 and the front side divided body 32, and is attached. When attached to the portion 20, the entire outer shape that forms a surface that is continuous with the outer peripheral surface of the body 14 is substantially frustoconical.

Then, the skin 18 is fixed to the base side divided body 32 by studs 34 over the entire circumference. Further, the original side divided body 32 includes the mounting portion 20 and the damping material 28.
The overall height is slightly higher than that. Further, the former side divided body 32 is provided with five screw introduction stepped holes 36 at equal intervals along the circumferential direction. This stepped hole 3
Reference numeral 6 denotes an intermediate portion along the radial direction that changes the inner diameter in a stepped manner, and is composed of a large diameter portion 36a located closer to the outer peripheral surface and a smaller diameter portion 36b located closer to the inner peripheral surface.

Further, the front side divided body 30 and the source side divided body 32
A plurality of (six in the illustrated example) screw jacks 40 are provided between
Is arranged and serves as a space adjusting means that can be operated from the opening on the base portion side of the base side divided body 32 to adjust the gap between the front side / base side divided bodies 30, 32. More specifically, multiple sets (6)
Adjusting bolts 4 to the metal arc plate 42 of
4 is protruded and the adjustment nut 46 is screwed to both the bolts 44, 44, and when the adjustment nut 46 is turned to one side, the two bolts 44, 44 are separated from each other and the front side / former side divided body 30, Three
The gap distance of 2 is widened. Initially, the bolts 44, 44 are set in such a state that the tips thereof are substantially in contact with each other. Further, the screw jack 40 includes a loosening prevention spring body,
In the illustrated example, a U-shaped spring washer 48 that can be inserted from one side is mounted. This is to prevent loosening due to vibration when playing the drum. This loosening prevention spring body may be only one.

As the leather (leather) 18, natural leather such as animal hide (eg, cowhide) or synthetic leather is used, and the back surface 18a is brought into contact with the tip flat surface 30a of the front side split body 30 to form the drum surface B. The ears 18b that are formed and located on the peripheral side are brought into contact with the outer peripheral surface of the frame body 16 (the front side divided body 30, the former side divided body 32). Then, with the ear portion 18b pulled in the direction of the base end of the base-side divided body 32 to stretch the drum surface A, the ear portion 1b
8b is fixed to the outer peripheral surface of the lower divided body 32 by means of a plurality of tacks 34. The ears 18b are provided with five through holes 18c corresponding to the stepped holes 36 at positions at equal intervals along the circumferential direction.

The tapping screw 22 is the head 2 with a cross hole.
2a and the screw part 22b. Further, the makeup cap 38 includes a head portion 38a having the same shape as the head portion 34a of the tack 34, and a holding cylinder portion 38b capable of being fitted and held in the large diameter portion 36a of the stepped hole 36. The head portion 38a of the makeup cap 38 and the head portion 34a of the tack 34 are colored in different colors.

Next, an example of a method for producing the Japanese drum A will be described.

First, while the skin 18 is being stretched, the frame 1
Fix the rivets 34 to 6 At this time, a large number of tacks 34,
With the ears 18b substantially circling vertically in two stages, the ears 18b
And it drives into the outer peripheral surface side of the frame 16. In addition, the ear 18b
The through hole 18c is aligned with the mounting hole 31 of the frame body 16. On the other hand, the damping member 2 is attached to the mounting portion 20 of the body 14.
8 is externally fitted.

Next, the frame 16 integrated with the skin 18
Is mounted on the mounting portion 20 of the vibration damping material 28 fitted to the outside. Then, from the outside of the stepped hole 36, the tapping screw 2
The male screw portion 22b of No. 2 is inserted, this male screw portion 22b is screwed into the damping material 28 and the mounting portion 20, and the male screw portion 22b is screwed and fixed to the mounting portion 20. At this time, the head portion 22a of the tapping screw 22 is brought into contact with the bottom surface of the large diameter portion 36a. Then, the fitting portion 38b of the makeup cap 38 is fitted to the large diameter portion 36a, and the head portion 38a of the makeup cap 38 is fitted.
Then, the large diameter portion 36a of the stepped hole 36 is hidden,
Complete the assembly.

When maintenance of the main drum A is required, for example, when the skin 18 is loosened after being used (played) for a long time, the tensioned state of the skin 18 is adjusted as follows. To do.

Decorative cap 38 and tapping screw 22
State in which a screwdriver (+ screwdriver in this embodiment) is inserted into the stepped hole 36 and the tapping screw 22 is retracted (usually 5 to 6 mm) until it is separated from the fitting wall portion 20a of the mounting portion 20 and the damping material 28. Then, the drum surface forming body 12 is removed. At this time, the head portion 38a of the makeup cap 38 is attached to the tack 34
The head portion 34a is colored differently from the head portion 34a, and the operator can instantly discriminate between the head portions 36a and 38a.
Can be smoothly removed.

Next, the spring washer 48 is removed (see FIG.
(See (a)), and then insert the hexagon wrench 50 from the opening side of the divided body 32 into the gap S between the front divided body 30 and the original divided body 32, and move the hexagon adjustment nut 46 to one side, that is,
The adjustment bolt 44 is rotated in the direction of separation (see FIG. 4).
(See (b)). In this way all screw jacks 40
Is operated to widen the gap distance between the front divided body 30 and the original divided body 32 to be the same. Then, since the skin 18 is fixed by tacking only to the base side divided body 32, the skin 18 is pulled to correct the slack, that is, the tension of the skin can be adjusted (tuned) to a correct state (Fig. 4 (c)). )reference).

Contrary to the above, the drum surface forming body 12 whose skin tension has been adjusted in this manner is inserted into the introduction stepped hole 36 with the tapping screw 22 in a state in which it is fitted and set in the mounting portion 20 of the body 14. Screw it in with a screwdriver. At this time, the damping material 28 of the tapping screw 22 and the fitting wall portion 20
Since a is a material that can be tapped, it is not necessary to match it with the original tapping screw hole. In this way, again, the Japanese drum A of the present embodiment can perform (practice) in a tuned and preferable state.

When the skin needs to be replaced / replaced, naturally, the drum surface forming body 12 removed from the body 14 without adjustment.
Is carried in to a specialized trader, and after the skin is replaced / replaced, it is carried out and attached to the body 14 in the same manner as described above.

In the present embodiment, in order to make it easier to distinguish between the head portion 38a of the makeup cap 38 and the head portion 34a of the tack 34, they are given different patterns or the shapes thereof are different. It can also be one.

Next, a Japanese drum B which is another embodiment will be described with reference to FIG. This Wadaiko B has a different connection means (connection member) and a screw jack 40.
Except for the loosening prevention of A, it has substantially the same configuration as the Japanese drum A of the first embodiment. The same parts as those in the above embodiment are designated by the same reference numerals, and the description thereof will be omitted in whole or in part.

As shown in FIG. 5 (a), this connecting member is arranged on the side of the body 14 and the engaging portion 52 arranged on the side of the drum surface forming body 12 (the former side divided body 32 of the frame 16). The main part is a locking arm 53 that is elastically locked to the locking portion 52. In this embodiment, the hexagonal adjustment nut 46 is used to prevent the screw jack 40 from loosening.
It is a pair of coil springs 48A, 48A arranged on both sides of, and does not need to be removed.

The locking portion 52 is arranged on the outer peripheral surface of the frame 16 in a projecting manner, and is made of a substantially crank-shaped wire or plate having its free end bent upward.

On the outer peripheral surface of the body 14, a plurality of movable fulcrums 54, each of which has a wire material in a hook shape or a ring shape, are arranged along the circumferential direction of the body 14, such as two or three. ing.

Further, an operating arm 56 is rotatably supported on each movable fulcrum 54. That is, the operation arm 56 is configured by using a wire material having a substantially tongue shape, and the base end portion 56a side is bent to form a shaft portion. In addition, the pair of left and right portions between the base end portion 56a and the free end portion 56b are provided with winding portions 56c each having a substantially circular shape to enhance elasticity of the operation arm 56. Then, the base end portion 56a
The entire operation arm 56 is rotatably supported by inserting the side shaft portion into the movable fulcrum 54.

The locking arm 53 is formed by using a substantially U-shaped wire rod, and the base end portion 53a side is bent to form a shaft portion (not shown). Then, this shaft portion is operated by the operation arm 56.
Since it is inserted into the winding portion 56c from the outside of the
The locking arm 53 is rotatably supported with respect to the operation arm 56.

In this connecting member, first, as shown in FIG. 5B, the locking arm 53 is hooked on the locking portion 52.
Next, when the free end portion 56b side of the operation arm 56 is pulled downward, the operation arm 56 rotates downward about the movable fulcrum 54 as a rotation center. This operation arm 56
5C, the locking arm 53 also moves downward, and the locking arm 53 moves the locking portion 52.
It is firmly locked against.

On the other hand, when the operation arm 56 is rotated upward about the movable fulcrum 54 in the locked state, the locking between the locking arm 53 and the locking portion 52 is released. The drum surface forming body 12 can be removed from the mounting portion 20.

Also in the above Wadaiko B, the frame 16 and the mounting portion 20 can be attached and detached by using the connecting member which has a simple structure and is easy to operate. Therefore, the same effect as the Japanese drum A of the first embodiment described above (the player himself can adjust the tension of the skin without carrying it in to a specialist).
Can be obtained.

In the second embodiment, the locking portion 5
2 may be arranged on the body 14 side, and the operation arm 56 and the locking arm 53 may be arranged on the frame body 16 side.

Further, the specific mode of the connecting member is not limited to the mode using the tapping screw 22 and the mode using the locking portion 52, the locking arm 53 and the like. For example, a connecting member is formed by a male screw portion formed on the outer peripheral surface of the mounting portion 20 and a female screw portion formed on the inner peripheral surface of the frame 16 and capable of being screwed into the male screw portion of the mounting portion 20. It can also be configured.

Further, in the first embodiment, the frame 16 and the skin 1
8, the screw introduction stepped hole 3 for mounting the makeup cap 38
Although the case where 6 is provided is shown, the tapping screw 22 as a connecting member is provided in the ear portion 1 of the skin 18 without providing the screw introduction hole.
8b ・ Screw into frame 16 (base side divided body 32) one after another,
Further, the frame 16 is joined together with the skin 18 to the body 14 by being screwed into the attachment part 20 (fitting wall part 20a), and the same studs as the case where the skin 18 is fixed to the frame 16 at another part. 34 may be used as a decorative cap and driven into the original side divided body 32 so as to hide the head portion 22a of the tapping screw 22. It should be noted that it is desirable to change the color of the head of the tack 34 as a makeup cap that hides the head 22a, as described above.

Further, a muffling device can be appropriately added to these Japanese drums.

In each of the embodiments described above, the frame body is a two-piece body, but it may be a three-piece body (front side / intermediate / source side) and a space adjusting means may be provided between them. Then, the gap between the front side / intermediate divided body may be a step adjusting means (for example, spacer insertion), and the gap between the front side / intermediate divided body may be a fine adjusting means such as a screw jack.

Further, the space adjusting means is not limited to the screw jack, but may be a cylinder jack, a spreading collet, a spreading link device or the like.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing a Japanese drum according to an embodiment of the present invention.

FIG. 2 is a vertical cross-sectional view of a main part of the Japanese drum of the same embodiment.

FIG. 3 is a partially cutaway plan view of the same embodiment.

FIG. 4A to FIG. 4C are cross-sectional views for explaining the method of adjusting the interval between the upper and lower divided bodies in the same embodiment.

5 (a) to 5 (c) are cross-sectional views for explaining an essential part in which the connecting means is another mode in the embodiment.

[Explanation of symbols]

A / B ... Japanese drum, 12 ... Drum formation 14 ... torso, 16 ... frame, 18 ... leather 20 ... Mounting part, 22 ... Tapping screw (connecting means) 30 ... Front divided body of frame 32 ... Original divided body of frame 40, 40A ... Screw jack (spacing adjustment means)

Claims (7)

[Claims] 1. A drum surface forming body comprising a frame body made of a material capable of being tacked, wherein a skin is stretched and fixed by tacking to form a drum surface, and a fitting to which the drum surface forming body can be fitted. A taiko drum, comprising: a body having a fitting portion having a fitting wall portion projecting from at least one end side; and the drum surface forming body detachably coupled to the mounting portion via a connecting means. Is a divided body having a gap in a plane orthogonal to the drum axis direction, the skin is fixed to the original divided body by tacking, and further, the divided body is operated from the opening side of the original divided body. A Japanese drum that is equipped with a space adjusting means capable of adjusting the space distance of the drum. 2. The Japanese drum according to claim 1, wherein the distance adjusting means is a screw jack. 3. The Japanese drum according to claim 2, wherein the screw jack further includes a locking spring body. 4. The connecting means includes a plurality of sets of tapping screws and a decorative cap, the tapping screws are capable of being screwed into the mounting portion by penetrating the original side divided body, and the decorative cap is The wadaiko according to claim 1, 2 or 3, which is held by the former side divided body to hide the head of the tapping screw. 5. The split member on the original side has an introduction stepped hole for the tapping screw, and the decorative cap has a holding cylinder portion capable of holding the introduction stepped hole for the tapping screw. The Japanese drum according to claim 4, which is characterized in that. 6. The Japanese drum according to claim 5, wherein the body is made of reinforced plastic. 7. The Japanese drum according to claim 4, wherein the body is made of reinforced plastic.